#header{
    /*向下渐变背景*/
    background-image: linear-gradient(to bottom,#212121,#616161);
    min-height: 30px;
    text-align: center;
    display: flex;
    justify-content: space-between;
}

.header-font{
    color: white;
    line-height: 30px;
    font-weight: 700;
}

#header-control{
    width: 33%;
    padding-left: 6px;
    display: flex;
    align-items: center;
}
#header-control div:nth-child(1){
    height: 18px;
    width: 18px;
    background: url("../img/icon/material/返回.svg") no-repeat;
    /*图片适应容器的尺寸*/
    background-size: contain;
}

/*信息条*/
#msg{
    width: 34%;
    line-height: 30px;
}

/*加号*/
#function{
    width: 33%;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding-right: 8px;
}